Elevator



A'. F. WARD :8; G. MEAD.

2 Sheets-Sheet 1.

(No Model.)

ELEVATOR.

No. 355,285. Patented De0.'28 ,'1886- m: New 5.

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2 Sheets-Sheet. 2.

(No Model.)

A. F. WARDXE G. MEAD.

"ELEVATOR.

No. 355,285. Patented Dec. 28, 1886.

UNITED STATES PATENT OFFICE.

ALEXANDER F. AR-D AND GEORGE MEAD, OE DETROIT, MICHIGAN.

ELEVATOR.

SPECIFICATION icrming part of Letters Patent No. 355,285, datedpecember28, 1886.

Application filed February 25, 1886. Serial No. 193,138.

To all whom it may concern:

Be it known that we, ALEXANDER F. WARD and GEORGE MEAD, of Detroit, inthe county of Wayne and State of Michigan, have invented new and usefulImprovements in Ele vators; and we hereby declarethat the following is afull, clear, and exact description thereof, referencebeing had to theaccompanying drawings, which form a part of this specilication;

This invention relates to a new and useful improvement in devicesespecially designed for locking elevator hatch-doors against accidentaldisplacement.

The object of the invention is to provide means for lockinghatchway-doors of the trapdoor style particularly, and in providingmeans for opening the doors up or down in the travel of the elevator;and the invention consists in the peculiar construct-ion and applicationof mechanism arranged with a counterbalance to the door that will compelsuch door to assume its horizontal position, closing the hatchwayimmediately after the passage of the elevator, all as more fullyhereinafter set forth. Figure 1 is a perspective view of a hatchway andplatform-elevator provided with our improved device. Fig. 2 is avertical section showing the elevator as in the act of passing throughthe hatchway and opening the trap. Fig. 3 is a diagram section. Fig. 4is a detailed perspective of one'of the lock-levers.

In the accompanying drawings, which form a part of this specification, Arepresents a hatchway through which the elevator'B is designed to pass,as in the ordinary manner. In the construction shown the guide-posts forthe elevator are at the center of the sides of the hatchway, and henceour device is arranged in connection therewith for operating thetrapdoors 0, which are secured to a rock-shaft, D, properly j ournaledacross one side of the hatchwayopening, and preferably below the levelof the floor. .45

rocker-arm, I, said rocker-arm and plate be- (No model.)

ing rigidly secured to the pinion F, so as to turn therewith. In eachend of the rockerarm is secured an anti-friction pulley or wheel, a a.

J is alever, one end of which is fulcrumed, as at 01, while the oppositeend, when in the position shown in Fig. 3, rests uponthe antifrictionrollers a a and this lever is rovided with a weight, K, and the plate Hhas also pivotally secured to one corner a counterweight, L, both ofthese weights being sufficient to compel the doors to assume ahorizontal from a vertical position, as hereinafter set forth. I I

At the opposite side of the hatchway to that occupied by the shalt Disjournaled in proper bearings arock-shaft, M, to which, upon oppositesides of the adjacent elevator-guide, are secured the stops N O,theformer of which has formed in its outer end a suitable hole to admit ofthe pin or stud P, which projects laterally from the side of the leverIt, which latter is fulcrumed to the adjacent side of the post by meansof a suitable bolt, 6, which passes through the slotc in the upperend ofthe lever, as shown.

In practice, the parts being in the position shown in Fig. 3, with theelevator below the floor, as the elevator rises an arch-piece, S, uponits top comes in contact with the lower face of one of the doors, whilea bar, T, upon its side at the same time impinges against the face ofthe curved and lower end of the lever B, pushing such lever outward,causing the stops N and O to turn into nearly a-vertical position. Inthe progress of the car the doors are opened, as in Fig. 3, from ahorizontal to a vertical position, as shown in Fig. 1. The doors inassuming this position have necessarilyturned or partially rotated therock-shaft D, and by the means herein described cause the plate H toassume the position shown in the same Fig. 1, with the end of the leverJ resting now upon the anti-friction roller c of the rocker-arm. Afterthe elevator has passed the free ends of the doors the counter-weight Kupon the lever performs its functionby forcing or bearing down upon suchanti-friction roller, and thereby compelling aretrograde movement of theparts, the doors gradually closing from the vertical to the horizontalposition and resting upon the ends of the stops N O, which have bygravity fallen forward in the line of radial travel of the doorimmediately after the passage of the elevator, and in this position thetrap is held against accidental displacement or opening in case any oneshould step upon it. As the elevator descends the bar T impinges againstthe upper part of the lever B, forcing it and the stops outwardly, freefrom engagement with the door, which is then free to be openeddownwardly by the elevator. wardly the connected mechanism has assumed aposition the reverse to that shown in Fig. 1, with the end of the leverJ resting upon the anti-friction wheel a. The elevator having passed thelower end of the door, the weight L causes the shaft D, through themechanism hereinbefore described, to partially rotate. The door radiallyswinging upward, the corner (1 of the cut-away portion of the doorpushes the stops and leveroutwardly until the door has swung past, whenthe stops again assumetheir original position, the door falling backupon them.

We design to employ similar stops at the outer corners of the doors,although but two are shown located at the center of the hatchway.

1t is obvious that our device can advantageously be attached to any andall kinds of trap swing-doors without departing from the spirit of ourinvention. It will also be observed that, where the room will admit ofit, the pinions E and F may be omitted, the plate H and rocker-armIbeing in this case connected directly to the shaft D.

Theweight L is a counterweight to the door, while the function of theweight K and lever J is to compel the doors to close from eitherdirection, and to hold them in a normal horizontal position, the end ofthe lever resting upon the two fulcrums a a in a horizontal plane.

In opening the doors down- What we claim as our invention is- 1. Thecombination, with the hatchway and 5 elevator-car, of the rockshaft M,stops carried 2. In a hatchway-elevator provided with a 50 swinging dooror doors secured upon a rockshaft,in combination with a weighted leverand rocker-arm, the latter being provided with a. bearing at each endfor the free end of the lever, and connections, substantially asdescribed,be-- tween said rock-shaft and rocker-arm, whereby the latteris operated by the movement of the former, substantially as set forth.

3. The combination,with the hatchway,rockshaft D, journaled therein, anddoors carried by said rock-shaft, of the lever J, plate H, androcker-arm I, said shaft and rocker arm all arranged and operatingsubstantially as and for the purposes specified.

4. The combination, with the hatchway, the rock-shaft journaled therein,and the door secured to said rock-shaft, of the lever J, semicircularplate H, connected and operated by said rock-shaft, weight L, androcker-arm I, provided with rollers a a, substantially as and for thepurposes specified.

5. The combination, with the hatchway, the rock-shaft D, journaledtherein, and the doors carried by said rock-shaft, of the pinions E F,

semicircular plateH and rocker-arm I, pro- 7 vided with rollers a a andsecured to said pinion F, the pivoted weighted lever J, and weight L,all substantially as shown and described.

ALEXANDER F. WARD. GEORGE MEAD.

Witnesses:

H. S. SPRAGUE, EDMOND SoULLY.

